TW200746867A - Piezoelectric speaker - Google Patents

Piezoelectric speaker

Info

Publication number
TW200746867A
TW200746867A TW095145047A TW95145047A TW200746867A TW 200746867 A TW200746867 A TW 200746867A TW 095145047 A TW095145047 A TW 095145047A TW 95145047 A TW95145047 A TW 95145047A TW 200746867 A TW200746867 A TW 200746867A
Authority
TW
Taiwan
Prior art keywords
speaker
actuated
membrane
sound
actuating layer
Prior art date
Application number
TW095145047A
Other languages
Chinese (zh)
Inventor
Edwin Ruiter
Original Assignee
Koninkl Philips Electronics Nv
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koninkl Philips Electronics Nv filed Critical Koninkl Philips Electronics Nv
Publication of TW200746867A publication Critical patent/TW200746867A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/045—Plane diaphragms using the distributed mode principle, i.e. whereby the acoustic radiation is emanated from uniformly distributed free bending wave vibration induced in a stiff panel and not from pistonic motion

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

The present invention relates to a piezoelectric speaker comprising a membrane (22), and an actuating layer comprising at least one piezoelectric element (24) mounted to the membrane, which at least one piezoelectric element is adapted to, when actuated, cause the membrane to vibrate in order to generate sound. The speaker is characterized by means (26, 36, 40, 42) for varying the fraction of the actuating layer that is actuated depending on the sound frequency to be generated, wherein a smaller fraction of the actuating layer is actuated for higher sound frequencies. Varying the fraction of the actuating layer that is actuated depending on the sound frequency to be generated allows reduction of the power consumption of the speaker with maintained sound pressure level. The invention also relates to a method for driving a piezoelectric speaker.
TW095145047A 2005-12-07 2006-12-04 Piezoelectric speaker TW200746867A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05111791 2005-12-07

Publications (1)

Publication Number Publication Date
TW200746867A true TW200746867A (en) 2007-12-16

Family

ID=37963792

Family Applications (1)

Application Number Title Priority Date Filing Date
TW095145047A TW200746867A (en) 2005-12-07 2006-12-04 Piezoelectric speaker

Country Status (5)

Country Link
US (1) US20100086151A1 (en)
JP (1) JP2009518922A (en)
CN (1) CN101385390A (en)
TW (1) TW200746867A (en)
WO (1) WO2007066262A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI387360B (en) * 2008-12-26 2013-02-21 Acer Inc Loudspeaker

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101141141B1 (en) 2008-12-17 2012-05-02 한국전자통신연구원 Piezoelectric loudspeaker system
CN102301215B (en) * 2009-01-27 2014-03-26 国立大学法人名古屋大学 Membrane tension measuring apparatus
USRE48797E1 (en) 2009-03-25 2021-10-26 Cochlear Limited Bone conduction device having a multilayer piezoelectric element
DE102009014770A1 (en) 2009-03-25 2010-09-30 Cochlear Ltd., Lane Cove vibrator
KR101561663B1 (en) * 2009-08-31 2015-10-21 삼성전자주식회사 Piezoelectric micro speaker having piston diaphragm and method of manufacturing the same
CN102111702B (en) * 2009-12-24 2014-02-19 精拓丽音科技（北京）有限公司 Piezoelectric flat panel loudspeaker with distributed ceramic wafers
CN102959991B (en) 2010-07-23 2015-10-21 日本电气株式会社 Oscillator
US8855705B2 (en) 2010-08-05 2014-10-07 Blackberry Limited Electronic device including actuator for providing tactile output
US8914075B2 (en) 2010-09-17 2014-12-16 Blackberry Limited Electronic device including actuator and method of controlling same for providing tactile output
CN102026075B (en) * 2010-12-21 2014-06-04 瑞声声学科技(深圳)有限公司 Vibration speaker
CN103037271B (en) * 2011-09-30 2016-08-17 苏州恒听电子有限公司 Voice tube device for Minitype speaker device
DE102015209234A1 (en) * 2015-05-20 2016-11-24 Robert Bosch Gmbh Device for emitting and / or receiving acoustic signals
US10440477B2 (en) * 2016-01-22 2019-10-08 Glauk S.R.L. Method and apparatus for playing audio by means of planar accoustic transducers
DE102016115260B3 (en) * 2016-08-17 2018-02-08 Infineon Technologies Ag SOUND WAVE SENSOR
US10356523B2 (en) * 2017-12-13 2019-07-16 Nvf Tech Ltd Distributed mode loudspeaker actuator including patterned electrodes
US10476461B2 (en) 2017-12-20 2019-11-12 Nvf Tech Ltd Active distributed mode actuator
US10477321B2 (en) * 2018-03-05 2019-11-12 Google Llc Driving distributed mode loudspeaker actuator that includes patterned electrodes
CN112637748B (en) * 2020-12-22 2022-04-26 上海交通大学 Piezoelectric MEMS loudspeaker with double annular surrounding circular vibrating membrane and preparation method
WO2023283784A1 (en) * 2021-07-12 2023-01-19 天津大学 Piezoelectric mems loudspeaker system
KR20230142674A (en) * 2022-04-01 2023-10-11 썬전 샥 컴퍼니 리미티드 sound device
WO2024009658A1 (en) * 2022-07-08 2024-01-11 富士フイルム株式会社 Electroacoustic transducer

Family Cites Families (10)

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Publication number Priority date Publication date Assignee Title
US3749855A (en) * 1969-01-09 1973-07-31 Motorola Inc Resistive electrode for an electrostrictive transducer
JPH05122793A (en) * 1991-10-25 1993-05-18 Murata Mfg Co Ltd Piezo-electric speaker
JPH07107592A (en) * 1993-09-29 1995-04-21 Seikosha Co Ltd Light emitting speaker
JPH09327094A (en) * 1996-06-05 1997-12-16 Murata Mfg Co Ltd Piezoelectric speaker
US6246158B1 (en) * 1999-06-24 2001-06-12 Sensant Corporation Microfabricated transducers formed over other circuit components on an integrated circuit chip and methods for making the same
US7608989B2 (en) * 1999-07-20 2009-10-27 Sri International Compliant electroactive polymer transducers for sonic applications
US20020015507A1 (en) * 2000-05-31 2002-02-07 Neil Harris Loudspeaker
JP2002152880A (en) * 2000-08-28 2002-05-24 Nippon Columbia Co Ltd Music appreciation chair
US6978032B2 (en) * 2001-11-29 2005-12-20 Matsushita Electric Industrial Co., Ltd. Piezoelectric speaker
JP2003244791A (en) * 2002-02-14 2003-08-29 Pioneer Electronic Corp Piezoelectric film speaker

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI387360B (en) * 2008-12-26 2013-02-21 Acer Inc Loudspeaker

Also Published As

Publication number Publication date
WO2007066262A1 (en) 2007-06-14
JP2009518922A (en) 2009-05-07
CN101385390A (en) 2009-03-11
US20100086151A1 (en) 2010-04-08

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